%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (the "License"); you may not use this file except in
%% compliance with the License. You may obtain a copy of the License
%% at http://www.mozilla.org/MPL/
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and
%% limitations under the License.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developer of the Original Code is GoPivotal, Inc.
%% Copyright (c) 2007-2014 GoPivotal, Inc.  All rights reserved.
%%

%% 交换机exchange direct直接匹配类型的逻辑处理模块
-module(rabbit_exchange_type_direct).
-include("rabbit.hrl").

-behaviour(rabbit_exchange_type).

-export([description/0, serialise_events/0, route/2]).
-export([validate/1, validate_binding/2,
         create/2, delete/3, policy_changed/2, add_binding/3,
         remove_bindings/3, assert_args_equivalence/2]).

-rabbit_boot_step({?MODULE,
				   [{description, "exchange type direct"},
					{mfa,         {rabbit_registry, register,
								   [exchange, <<"direct">>, ?MODULE]}},
					{requires,    rabbit_registry},
					{enables,     kernel_ready}]}).

description() ->
	[{description, <<"AMQP direct exchange, as per the AMQP specification">>}].


serialise_events() -> false.


%% exchange交换机类型为direct的实际的路由操作函数
route(#exchange{name = Name},
	  #delivery{message = #basic_message{routing_keys = Routes}}) ->
	rabbit_router:match_routing_key(Name, Routes).


validate(_X) -> ok.


validate_binding(_X, _B) -> ok.


create(_Tx, _X) -> ok.


delete(_Tx, _X, _Bs) -> ok.


policy_changed(_X1, _X2) -> ok.


add_binding(_Tx, _X, _B) -> ok.


remove_bindings(_Tx, _X, _Bs) -> ok.


assert_args_equivalence(X, Args) ->
	rabbit_exchange:assert_args_equivalence(X, Args).
